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2 Sheets-Sheet 1.

7 (No Model.)

J. MUSGRAVE.

' OSGILLATING VALVE.

Patented Dec; 23, 1884.

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2 Sheets-Sheet 2..

(No Model.)

J. MUS'GRAVE. OSGIL'LATING VALVE.

Patented Dec.- 23, 1884.

UniTnn fiTaTns PATENT @Tirice.

JOHN MUSGRAVE, OF BOLTON, COUNTY OF LANCASTER, ENGLAND.

OSClLLATING VALVE.

SPECIFICATION forming part of Letters Patent. No. 309,558. dated December 23, 1884:.

Application filed October 9, 1854. (No model.)

1 (L65 whom 21/: may concern:

Be it known that I, Joi-nv MUSGRM'E, a sul ject of the Queen of Great Britain, residing at Bolton, in the county otLancaster, England, have invented a new and useful Improvement in Operating Oscillating Valves of lvIUlllVG- Power Engines, (for which I have obtained a patentin Great Britain, No. 4, 293, hearing date September 6, 1883,)01" which the followingis a specification.

My invention relates to improvements in oscillating valves, and the object of my improvements is to give a longitudinal or traversing motion to the valve during the time that it is oscillating to open and close the port. This has been heretofore accomplished by the use of screwthreads or wedge-faces acting on the spindle or attachments thereol". I make use, instead, of a cane-faced ring, which is partly turned by the turning of the spindle in one direction, and, consequently bearing against a collar on said spindle, moves the spindle and valve longitudinally, so as to distribute the wear evenly over the lace of the valve-seat.

Figure 1 is an end view, and Fig. 2 an elevation, partly in section, of part of an oscillating valve to which my invention is applied. Figs. 3 and 4 are views, partly in section, of a modification of my invention.

Similar letters refer to similar parts througlr out the several views.

In Figs. 1 and 2 I form thevalvc as usual, and pass the valve-spindle through a stul'lingbox at each end. I make the spindle in two parts, a c. Tllhe'va-lve .r is free to slide longi tudinall y on the part a, to which are secured the ordinary levers (not shown in the drawings) lor actuating the valve, and. the part c lits into the end of the part a in which is a slot, 9 The spiudlec is secured to the valve 0 and to the spindle a by a cotter passing through the slot 1 The slot 3 is long enough to allow the spindlca and the valve :r to move longitudinally, as hereinafter described, without moving the spindle a.

a" is'a fixed collar on the spindle a, and I) is a loose collar on thesame, on which is formed an eccentric ring, Z), the periphery of which fits in the recess or bearing 0 in the bracket 0. On the other end of the loose collar 1), which passes through abearing in the bracketlatented in England September (3. 1583, No. 4,99.

c, is fixed theratchet-wheel d, to which motion is imparted by the pawl e on the leverf,which is fixed on the end of the spindle a. WVhen the valve 00 oscillates to open or close the port, the lever f on the spindle a also oscillates, and l the pawl 6 causes the wheel (I and loose collar b to make part of a revolution at each forl ward movement of the valve, and the eccentric ring I), being moved in the stationary rccess or bearing, 0, imparts a longitudinal moj tion to the spindle c, and so to the valve sil multaneously with the oscillating movement, thereby altering the position of the valve on its seat, thus insuring greater durability of the workingi'aces of the valve. The pawl 0 maybe taken out of gear with the ratchet wheel d, when desired to stop the longitudinal motion of the valve.

In the modification of my invention illus trated inv Figs. 3 and l I dispense with the stuffing-box on the back bonnet and communicate the longitudinal movement to the valve by an eccentric ring and. ratchet-wheel incloscd in the back bonnet.

a is the valvc-s iiindle, on which is the loose collar Z), formed with T-arms b parallel with and outside the valve-spindle a, the ends of which arms are secured in a recess in thevalve a; by a plate,/. On one end of the loose col lar b is screwed or otherwise fixed the ratchetwhecl d.

b is the eccentric ring,which tits in the re cess c, and is loose on the collar Z). I11 this ring I) is the pawl or catch 0, pressed forward by a spiral spring into contact with teeth formed on the side of the ratchet-wheel d. \V hen the valve it moves forward or oscillates to open the port, the teeth on the ratchet-wheel d bear against the pawl c and turn it and the eccentric ring if partly round, thereby moving the collar I) with the Terms 1) and the valve ;r longitudinally. \Vhen the valve 00 moves backward to close the port, the ratchetteeth press the pawl inward and pass over it without turning the ring 11". I

An eccentric ring or collar might be fixed on the valve-spindle and enter a recess or bearing to elt'ect the same object.

By the use of my invention the leakage of oscillating valves is reduced to a minimum and their durability is greatly increased.

\Vhat I claim as my invention, and desire to I l l secure by Letters Patent of the United States, lar 12 having fixed upon it a ratchet-wheel, d,

1. In combination with an oscillating valve and valve-spindle, an eccentric ring in con- 5 tact with a collar or flange of said spindle, a grooved bearing which receives the peripheral part of said ring, and a pawl and ratchet, whereby the turning of said spindle in one direction causes said ring to turn in said beario ing and against said collar, and thereby move the valve-spindle and valve longitudinally, as set forth.

2. The combination of the oscillating valve 00 and spindle a with the loose collar 6, secured I5 by T-arnis b to the said valve 00, the said coland fittedvloosely upon it an eccentric ring, if, fitting in the stationary bearing 0, the said ring I) being provided with the spring-pawl e, engaging with the teeth of the wheel d, sub- 20 stantially as herein shown and described, for the purposes specified.

The foregoing specification of my improvement in operating oscillating valves of 1110- tiVe-power engines signed by me this 22d day 25 of September, 1884.

JOHN MUSGRAVE.

Witnesses:

ROBERT WINDER, H. B. BARLoW. 

